Sidi Ali is a district in Mostaganem Province, Algeria. It was named after its capital, Sidi Ali.

The district is further divided into 4 municipalities:

• Sidi Ali
• Tazgait
• Ouled Malah

36°06′17″N 0°25′24″E / 36.1047°N 0.4233°E / 36.1047; 0.4233